LIQUI MOLY 1100603 Diesel System Cleaner 989 Direct, supplied in a 0.5 liter container, is a highly effective diesel fuel additive designed for cleaning and protecting the diesel injection system. This light brown, liquid additive, which has a density of 0.814 kg/L, actively removes deposits from injection nozzles and within the combustion chamber, while preventing the formation of new deposits. This genuine LIQUI MOLY additive optimizes the combustion process, which can lead to reduced fuel consumption. It also provides comprehensive protection for the entire fuel system against corrosion and wear. Additionally, it improves the cetane number of the diesel fuel. This cleaner is suitable for all diesel engines, including modern common rail and pump-jet systems, and can be used both preventatively and as a solution for existing issues.